builtin/send-pack.c

   1 #include "builtin.h"
   2 #include "commit.h"
   3 #include "refs.h"
   4 #include "pkt-line.h"
   5 #include "sideband.h"
   6 #include "run-command.h"
   7 #include "remote.h"
   8 #include "send-pack.h"
   9 #include "quote.h"
  10 #include "transport.h"
  11 #include "version.h"
  12
  13 static const char send_pack_usage[] =
  14 "git send-pack [--all | --mirror] [--dry-run] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
  15 "  --all and explicit <ref> specification are mutually exclusive.";
  16
  17 static struct send_pack_args args;
  18
  19 static int feed_object(const unsigned char *sha1, int fd, int negative)
  20 {
  21         char buf[42];
  22
  23         if (negative && !has_sha1_file(sha1))
  24                 return 1;
  25
  26         memcpy(buf + negative, sha1_to_hex(sha1), 40);
  27         if (negative)
  28                 buf[0] = '^';
  29         buf[40 + negative] = '\n';
  30         return write_or_whine(fd, buf, 41 + negative, "send-pack: send refs");
  31 }
  32
  33 /*
  34  * Make a pack stream and spit it out into file descriptor fd
  35  */
  36 static int pack_objects(int fd, struct ref *refs, struct extra_have_objects *extra, struct send_pack_args *args)
  37 {
  38         /*
  39          * The child becomes pack-objects --revs; we feed
  40          * the revision parameters to it via its stdin and
  41          * let its stdout go back to the other end.
  42          */
  43         const char *argv[] = {
  44                 "pack-objects",
  45                 "--all-progress-implied",
  46                 "--revs",
  47                 "--stdout",
  48                 NULL,
  49                 NULL,
  50                 NULL,
  51                 NULL,
  52                 NULL,
  53         };
  54         struct child_process po;
  55         int i;
  56
  57         i = 4;
  58         if (args->use_thin_pack)
  59                 argv[i++] = "--thin";
  60         if (args->use_ofs_delta)
  61                 argv[i++] = "--delta-base-offset";
  62         if (args->quiet || !args->progress)
  63                 argv[i++] = "-q";
  64         if (args->progress)
  65                 argv[i++] = "--progress";
  66         memset(&po, 0, sizeof(po));
  67         po.argv = argv;
  68         po.in = -1;
  69         po.out = args->stateless_rpc ? -1 : fd;
  70         po.git_cmd = 1;
  71         if (start_command(&po))
  72                 die_errno("git pack-objects failed");
  73
  74         /*
  75          * We feed the pack-objects we just spawned with revision
  76          * parameters by writing to the pipe.
  77          */
  78         for (i = 0; i < extra->nr; i++)
  79                 if (!feed_object(extra->array[i], po.in, 1))
  80                         break;
  81
  82         while (refs) {
  83                 if (!is_null_sha1(refs->old_sha1) &&
  84                     !feed_object(refs->old_sha1, po.in, 1))
  85                         break;
  86                 if (!is_null_sha1(refs->new_sha1) &&
  87                     !feed_object(refs->new_sha1, po.in, 0))
  88                         break;
  89                 refs = refs->next;
  90         }
  91
  92         close(po.in);
  93
  94         if (args->stateless_rpc) {
  95                 char *buf = xmalloc(LARGE_PACKET_MAX);
  96                 while (1) {
  97                         ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
  98                         if (n <= 0)
  99                                 break;
 100                         send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
 101                 }
 102                 free(buf);
 103                 close(po.out);
 104                 po.out = -1;
 105         }
 106
 107         if (finish_command(&po))
 108                 return -1;
 109         return 0;
 110 }
 111
 112 static int receive_status(int in, struct ref *refs)
 113 {
 114         struct ref *hint;
 115         char line[1000];
 116         int ret = 0;
 117         int len = packet_read_line(in, line, sizeof(line));
 118         if (len < 10 || memcmp(line, "unpack ", 7))
 119                 return error("did not receive remote status");
 120         if (memcmp(line, "unpack ok\n", 10)) {
 121                 char *p = line + strlen(line) - 1;
 122                 if (*p == '\n')
 123                         *p = '\0';
 124                 error("unpack failed: %s", line + 7);
 125                 ret = -1;
 126         }
 127         hint = NULL;
 128         while (1) {
 129                 char *refname;
 130                 char *msg;
 131                 len = packet_read_line(in, line, sizeof(line));
 132                 if (!len)
 133                         break;
 134                 if (len < 3 ||
 135                     (memcmp(line, "ok ", 3) && memcmp(line, "ng ", 3))) {
 136                         fprintf(stderr, "protocol error: %s\n", line);
 137                         ret = -1;
 138                         break;
 139                 }
 140
 141                 line[strlen(line)-1] = '\0';
 142                 refname = line + 3;
 143                 msg = strchr(refname, ' ');
 144                 if (msg)
 145                         *msg++ = '\0';
 146
 147                 /* first try searching at our hint, falling back to all refs */
 148                 if (hint)
 149                         hint = find_ref_by_name(hint, refname);
 150                 if (!hint)
 151                         hint = find_ref_by_name(refs, refname);
 152                 if (!hint) {
 153                         warning("remote reported status on unknown ref: %s",
 154                                         refname);
 155                         continue;
 156                 }
 157                 if (hint->status != REF_STATUS_EXPECTING_REPORT) {
 158                         warning("remote reported status on unexpected ref: %s",
 159                                         refname);
 160                         continue;
 161                 }
 162
 163                 if (line[0] == 'o' && line[1] == 'k')
 164                         hint->status = REF_STATUS_OK;
 165                 else {
 166                         hint->status = REF_STATUS_REMOTE_REJECT;
 167                         ret = -1;
 168                 }
 169                 if (msg)
 170                         hint->remote_status = xstrdup(msg);
 171                 /* start our next search from the next ref */
 172                 hint = hint->next;
 173         }
 174         return ret;
 175 }
 176
 177 static void print_helper_status(struct ref *ref)
 178 {
 179         struct strbuf buf = STRBUF_INIT;
 180
 181         for (; ref; ref = ref->next) {
 182                 const char *msg = NULL;
 183                 const char *res;
 184
 185                 switch(ref->status) {
 186                 case REF_STATUS_NONE:
 187                         res = "error";
 188                         msg = "no match";
 189                         break;
 190
 191                 case REF_STATUS_OK:
 192                         res = "ok";
 193                         break;
 194
 195                 case REF_STATUS_UPTODATE:
 196                         res = "ok";
 197                         msg = "up to date";
 198                         break;
 199
 200                 case REF_STATUS_REJECT_NONFASTFORWARD:
 201                         res = "error";
 202                         msg = "non-fast forward";
 203                         break;
 204
 205                 case REF_STATUS_REJECT_NODELETE:
 206                 case REF_STATUS_REMOTE_REJECT:
 207                         res = "error";
 208                         break;
 209
 210                 case REF_STATUS_EXPECTING_REPORT:
 211                 default:
 212                         continue;
 213                 }
 214
 215                 strbuf_reset(&buf);
 216                 strbuf_addf(&buf, "%s %s", res, ref->name);
 217                 if (ref->remote_status)
 218                         msg = ref->remote_status;
 219                 if (msg) {
 220                         strbuf_addch(&buf, ' ');
 221                         quote_two_c_style(&buf, "", msg, 0);
 222                 }
 223                 strbuf_addch(&buf, '\n');
 224
 225                 safe_write(1, buf.buf, buf.len);
 226         }
 227         strbuf_release(&buf);
 228 }
 229
 230 static int sideband_demux(int in, int out, void *data)
 231 {
 232         int *fd = data, ret;
 233 #ifdef NO_PTHREADS
 234         close(fd[1]);
 235 #endif
 236         ret = recv_sideband("send-pack", fd[0], out);
 237         close(out);
 238         return ret;
 239 }
 240
 241 int send_pack(struct send_pack_args *args,
 242               int fd[], struct child_process *conn,
 243               struct ref *remote_refs,
 244               struct extra_have_objects *extra_have)
 245 {
 246         int in = fd[0];
 247         int out = fd[1];
 248         struct strbuf req_buf = STRBUF_INIT;
 249         struct ref *ref;
 250         int new_refs;
 251         int allow_deleting_refs = 0;
 252         int status_report = 0;
 253         int use_sideband = 0;
 254         int quiet_supported = 0;
 255         int agent_supported = 0;
 256         unsigned cmds_sent = 0;
 257         int ret;
 258         struct async demux;
 259
 260         /* Does the other end support the reporting? */
 261         if (server_supports("report-status"))
 262                 status_report = 1;
 263         if (server_supports("delete-refs"))
 264                 allow_deleting_refs = 1;
 265         if (server_supports("ofs-delta"))
 266                 args->use_ofs_delta = 1;
 267         if (server_supports("side-band-64k"))
 268                 use_sideband = 1;
 269         if (server_supports("quiet"))
 270                 quiet_supported = 1;
 271         if (server_supports("agent"))
 272                 agent_supported = 1;
 273
 274         if (!remote_refs) {
 275                 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
 276                         "Perhaps you should specify a branch such as 'master'.\n");
 277                 return 0;
 278         }
 279
 280         /*
 281          * Finally, tell the other end!
 282          */
 283         new_refs = 0;
 284         for (ref = remote_refs; ref; ref = ref->next) {
 285                 if (!ref->peer_ref && !args->send_mirror)
 286                         continue;
 287
 288                 /* Check for statuses set by set_ref_status_for_push() */
 289                 switch (ref->status) {
 290                 case REF_STATUS_REJECT_NONFASTFORWARD:
 291                 case REF_STATUS_UPTODATE:
 292                         continue;
 293                 default:
 294                         ; /* do nothing */
 295                 }
 296
 297                 if (ref->deletion && !allow_deleting_refs) {
 298                         ref->status = REF_STATUS_REJECT_NODELETE;
 299                         continue;
 300                 }
 301
 302                 if (!ref->deletion)
 303                         new_refs++;
 304
 305                 if (args->dry_run) {
 306                         ref->status = REF_STATUS_OK;
 307                 } else {
 308                         char *old_hex = sha1_to_hex(ref->old_sha1);
 309                         char *new_hex = sha1_to_hex(ref->new_sha1);
 310                         int quiet = quiet_supported && (args->quiet || !args->progress);
 311
 312                         if (!cmds_sent && (status_report || use_sideband ||
 313                                            quiet || agent_supported)) {
 314                                 packet_buf_write(&req_buf,
 315                                                  "%s %s %s%c%s%s%s%s%s",
 316                                                  old_hex, new_hex, ref->name, 0,
 317                                                  status_report ? " report-status" : "",
 318                                                  use_sideband ? " side-band-64k" : "",
 319                                                  quiet ? " quiet" : "",
 320                                                  agent_supported ? " agent=" : "",
 321                                                  agent_supported ? git_user_agent_sanitized() : ""
 322                                                 );
 323                         }
 324                         else
 325                                 packet_buf_write(&req_buf, "%s %s %s",
 326                                                  old_hex, new_hex, ref->name);
 327                         ref->status = status_report ?
 328                                 REF_STATUS_EXPECTING_REPORT :
 329                                 REF_STATUS_OK;
 330                         cmds_sent++;
 331                 }
 332         }
 333
 334         if (args->stateless_rpc) {
 335                 if (!args->dry_run && cmds_sent) {
 336                         packet_buf_flush(&req_buf);
 337                         send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
 338                 }
 339         } else {
 340                 safe_write(out, req_buf.buf, req_buf.len);
 341                 packet_flush(out);
 342         }
 343         strbuf_release(&req_buf);
 344
 345         if (use_sideband && cmds_sent) {
 346                 memset(&demux, 0, sizeof(demux));
 347                 demux.proc = sideband_demux;
 348                 demux.data = fd;
 349                 demux.out = -1;
 350                 if (start_async(&demux))
 351                         die("send-pack: unable to fork off sideband demultiplexer");
 352                 in = demux.out;
 353         }
 354
 355         if (new_refs && cmds_sent) {
 356                 if (pack_objects(out, remote_refs, extra_have, args) < 0) {
 357                         for (ref = remote_refs; ref; ref = ref->next)
 358                                 ref->status = REF_STATUS_NONE;
 359                         if (args->stateless_rpc)
 360                                 close(out);
 361                         if (git_connection_is_socket(conn))
 362                                 shutdown(fd[0], SHUT_WR);
 363                         if (use_sideband)
 364                                 finish_async(&demux);
 365                         return -1;
 366                 }
 367         }
 368         if (args->stateless_rpc && cmds_sent)
 369                 packet_flush(out);
 370
 371         if (status_report && cmds_sent)
 372                 ret = receive_status(in, remote_refs);
 373         else
 374                 ret = 0;
 375         if (args->stateless_rpc)
 376                 packet_flush(out);
 377
 378         if (use_sideband && cmds_sent) {
 379                 if (finish_async(&demux)) {
 380                         error("error in sideband demultiplexer");
 381                         ret = -1;
 382                 }
 383                 close(demux.out);
 384         }
 385
 386         if (ret < 0)
 387                 return ret;
 388
 389         if (args->porcelain)
 390                 return 0;
 391
 392         for (ref = remote_refs; ref; ref = ref->next) {
 393                 switch (ref->status) {
 394                 case REF_STATUS_NONE:
 395                 case REF_STATUS_UPTODATE:
 396                 case REF_STATUS_OK:
 397                         break;
 398                 default:
 399                         return -1;
 400                 }
 401         }
 402         return 0;
 403 }
 404
 405 int cmd_send_pack(int argc, const char **argv, const char *prefix)
 406 {
 407         int i, nr_refspecs = 0;
 408         const char **refspecs = NULL;
 409         const char *remote_name = NULL;
 410         struct remote *remote = NULL;
 411         const char *dest = NULL;
 412         int fd[2];
 413         struct child_process *conn;
 414         struct extra_have_objects extra_have;
 415         struct ref *remote_refs, *local_refs;
 416         int ret;
 417         int helper_status = 0;
 418         int send_all = 0;
 419         const char *receivepack = "git-receive-pack";
 420         int flags;
 421         int nonfastforward = 0;
 422         int progress = -1;
 423
 424         argv++;
 425         for (i = 1; i < argc; i++, argv++) {
 426                 const char *arg = *argv;
 427
 428                 if (*arg == '-') {
 429                         if (!prefixcmp(arg, "--receive-pack=")) {
 430                                 receivepack = arg + 15;
 431                                 continue;
 432                         }
 433                         if (!prefixcmp(arg, "--exec=")) {
 434                                 receivepack = arg + 7;
 435                                 continue;
 436                         }
 437                         if (!prefixcmp(arg, "--remote=")) {
 438                                 remote_name = arg + 9;
 439                                 continue;
 440                         }
 441                         if (!strcmp(arg, "--all")) {
 442                                 send_all = 1;
 443                                 continue;
 444                         }
 445                         if (!strcmp(arg, "--dry-run")) {
 446                                 args.dry_run = 1;
 447                                 continue;
 448                         }
 449                         if (!strcmp(arg, "--mirror")) {
 450                                 args.send_mirror = 1;
 451                                 continue;
 452                         }
 453                         if (!strcmp(arg, "--force")) {
 454                                 args.force_update = 1;
 455                                 continue;
 456                         }
 457                         if (!strcmp(arg, "--quiet")) {
 458                                 args.quiet = 1;
 459                                 continue;
 460                         }
 461                         if (!strcmp(arg, "--verbose")) {
 462                                 args.verbose = 1;
 463                                 continue;
 464                         }
 465                         if (!strcmp(arg, "--progress")) {
 466                                 progress = 1;
 467                                 continue;
 468                         }
 469                         if (!strcmp(arg, "--no-progress")) {
 470                                 progress = 0;
 471                                 continue;
 472                         }
 473                         if (!strcmp(arg, "--thin")) {
 474                                 args.use_thin_pack = 1;
 475                                 continue;
 476                         }
 477                         if (!strcmp(arg, "--stateless-rpc")) {
 478                                 args.stateless_rpc = 1;
 479                                 continue;
 480                         }
 481                         if (!strcmp(arg, "--helper-status")) {
 482                                 helper_status = 1;
 483                                 continue;
 484                         }
 485                         usage(send_pack_usage);
 486                 }
 487                 if (!dest) {
 488                         dest = arg;
 489                         continue;
 490                 }
 491                 refspecs = (const char **) argv;
 492                 nr_refspecs = argc - i;
 493                 break;
 494         }
 495         if (!dest)
 496                 usage(send_pack_usage);
 497         /*
 498          * --all and --mirror are incompatible; neither makes sense
 499          * with any refspecs.
 500          */
 501         if ((refspecs && (send_all || args.send_mirror)) ||
 502             (send_all && args.send_mirror))
 503                 usage(send_pack_usage);
 504
 505         if (remote_name) {
 506                 remote = remote_get(remote_name);
 507                 if (!remote_has_url(remote, dest)) {
 508                         die("Destination %s is not a uri for %s",
 509                             dest, remote_name);
 510                 }
 511         }
 512
 513         if (progress == -1)
 514                 progress = !args.quiet && isatty(2);
 515         args.progress = progress;
 516
 517         if (args.stateless_rpc) {
 518                 conn = NULL;
 519                 fd[0] = 0;
 520                 fd[1] = 1;
 521         } else {
 522                 conn = git_connect(fd, dest, receivepack,
 523                         args.verbose ? CONNECT_VERBOSE : 0);
 524         }
 525
 526         memset(&extra_have, 0, sizeof(extra_have));
 527
 528         get_remote_heads(fd[0], &remote_refs, REF_NORMAL, &extra_have);
 529
 530         transport_verify_remote_names(nr_refspecs, refspecs);
 531
 532         local_refs = get_local_heads();
 533
 534         flags = MATCH_REFS_NONE;
 535
 536         if (send_all)
 537                 flags |= MATCH_REFS_ALL;
 538         if (args.send_mirror)
 539                 flags |= MATCH_REFS_MIRROR;
 540
 541         /* match them up */
 542         if (match_push_refs(local_refs, &remote_refs, nr_refspecs, refspecs, flags))
 543                 return -1;
 544
 545         set_ref_status_for_push(remote_refs, args.send_mirror,
 546                 args.force_update);
 547
 548         ret = send_pack(&args, fd, conn, remote_refs, &extra_have);
 549
 550         if (helper_status)
 551                 print_helper_status(remote_refs);
 552
 553         close(fd[1]);
 554         close(fd[0]);
 555
 556         ret |= finish_connect(conn);
 557
 558         if (!helper_status)
 559                 transport_print_push_status(dest, remote_refs, args.verbose, 0, &nonfastforward);
 560
 561         if (!args.dry_run && remote) {
 562                 struct ref *ref;
 563                 for (ref = remote_refs; ref; ref = ref->next)
 564                         transport_update_tracking_ref(remote, ref, args.verbose);
 565         }
 566
 567         if (!ret && !transport_refs_pushed(remote_refs))
 568                 fprintf(stderr, "Everything up-to-date\n");
 569
 570         return ret;
 571 }